void main() {
//  test('adds one to input values', () {
////    final calculator = new Calculator();
////    expect(calculator.addOne(2), 3);
////    expect(calculator.addOne(-7), -6);
////    expect(calculator.addOne(0), 1);
////    expect(() => calculator.addOne(null), throwsNoSuchMethodError);
//  });
}
